The ranking of my website dropped by 9 positions in a day.

[GoldenPlaya3]

I launched my website in August 2022 for our own corporate business and had successfully ranked it in the top position for the desired keywords. At least, this was the case until a few days ago. For instance, my website was ranking first for a specific keyword, but the next day, I found it had dropped to ninth place. There were no issues like a decrease in backlinks; however, I noticed that another website had copied a few sentences from the homepage of my site in October 2022 (the page that lost ranking). Could it be possible that Google lowered my site's ranking due to the use of duplicate content? If you'd like to investigate further, my website is: https://www.bysatlasreklamtabela.com/